Update:

The template used to create the wmv video had a 125 kbps bitrate. The flv compression default bitrate was set at 500. Basically the resulting flv file was 5 times larger than the original wmv video.

Reducing the flv bitrate has resulted in a significant change. My Site Editor's wmv template is a bit low in video res... but I think it is adequate and might opt for the same res on the site.

Thanks admin and Leki for your input.

Dafydd